Grinding-machine.



M. 0. REEVES.

GRINDING MACHINE. APPLICATION FILED APR.28.'19H

' Patentdl Apr. 23,1918.

- 3 SHEETS-SHEET I.

NE /A M. 0. REEVES.

GRINDING MACHINE.

APPLICATION FILED APRFZB. I917- LfiM WQW Patented Apr. 23,1918.

3 SHEETS-SHEET 2 aflmd l boz l li Hon O.Reeves,

M. 0. REEVES.

GRINDING MACHINE.

APPLICATION FILED APR. 28. I917.

Patented Apr. 23,1918.

3 SHEETSSHEET 3- lmwmtoz MiHon OReevee,

- face at an angle, preferably closely a proxitltl embodying myinvention;

mrort o. nnnvns, or contracts, INDIANA, nssren'on ro nnnvns runnnr cona- A ooaroaarron' or'rn'nrana.

F COLUMBUS, INDIANA,

Specification of Letters Patent.

GRINDING-MACHINE.

Fatented a as, far,

Application filed Apri1 28, 1917. Serial Ito. 165,0t9.

To all whom it may concern Be it known that I, Mimon 0. Rnnvns, acitizen of the United States, residing at C0- lumbus, in the county ofBartholomew .and State of Indiana, useful Grinding-Machine, of which thefollowing is a specification.

The object of my invention is to produce a slmple and efficient machinefor accurately grinding cylindrical objects, such as rollers for rollerbearings, at small expense.

The accompanying-drawings illustrate my invention. Figure 1 is a plan ofa machine Fig. 2 a front elevation; Fig. 3 a sideelevation; Fig. 4 asection on line 44 of Fig. 5; Fig. ,5 a section on line 55 of Fig. 4;Fig. 6 a plan of a modified form of machine, and Fig. 7 a plan ofanother modification.

In the drawings, ,10' indicates a ..main frame carrying a longitudinallyadjustable cross head 11, mounted in suitable guides'12 in the frame 10,andreadily longitudinally shiftableby means ofa hand lever 13, spring14, pinion1'5nnd rack 16. Movement of the cross head in one direction islimited adj'ustably' by a temper screw 17. Journaled inv across headll,parallel with the movement of..-the"eross head, is a shaft 21 whichcarries a"crown wheel 22 at one end. By crown wheel, I mean a ringhaving an active mating 90, to the axis of the whee This crown wheel isnot necessarily an abrading element, but it is much more convenient thatits active face should be of a standard abrading material of desiredtexture, such that it may control the speed of rotation of the articleto be ground. 'Mounted upon frame beyond the propeller wheel 22, is ahead 25, in which is ournaled a shaft 26 which lies substantially atright angles to the axis of the shaft 2.1, and carries at one end agrinding wheel 27, the circumferential edge of which is arranged closelyadjacent the active crown face of the wheel 22. Head is carried upon theupper end of a cross head 28 which may be vertically adjusted byadjusting screw 29 and, in order that the vertical angle ofshaft 26 maybe adjusted, one of its bearings 30 is pivoted at 31' upon head 25,While the other bearing 32 is supported by a wedge 33 which may be adusted by a temper screw 34, so as to tilt shaft 26 a vertical plane.

have Invented a new and form 36, which is carried sition.

-lBearing 32 after adjustment is clamped in place by clamping screws 35.Any other sultable means may be provided for adjusting the verticalangle of the shaft 26.

Mounted between the adjacent faces of wheels 27 and 22, is awork-supporting plat- 'upon the upper end of a cross head 37, mounted ina guide 38 and vertically adjustable by meansot' an ad usting screw 39.Guide 38 is. carried by a horizontally movable cross head 40, mounted insuitable guides 41, and horizontally adjustable by the adjusting screw42, t e arrangement being such that platform 36 may be readily-adjustedboth horizontally and vertically.

a In the formshown in Figs. 1-5, inclusive, crown Wheel 22 is rotated ata comparatively slow speed in the direction indicated by the arrows, andwheel 27 is rotated at a very much higher speed'in cated by the arrows.Shaft 26 may be adjusted either to lie ina plane parallel with the planeof platform 36, or maybe tilted vertically in either direction from thispo- With the propeller wheel rotating in the direction indicated by thearrows, platform 36 will be adjusted so as to bring the axis of thearticle 43 to be ground, practically into the plane of the axis of shaft26 at the middle of the active'face of wheel 27 and if the axis of shaft26 is parallel to the platform 36, the coaction of the two wheels thedirection indi-- 22 and 27' upon the interposed article 43,

will be such as to rotate said article upon its own axis, and to feedthe same slowly axially betweenthe two wheels 22 and 27 and toward theaxis of shaft 21. This axial movement of the article 43 may, be retardedby adjusting the wheel-end of shaft 26 upwardly. An adjustment of theangle of shaft 26 in the opposite direction will accelerate the axialmovement of article 43. Variation of the angle oftaxis 26 fromparallelism with platform 36 will, of course, require a verticaladjustment of head 25 until the full radius of wheel 27 is broughtsubstantially opposite the axis of article 43, and this variation of theaxis of shaft 26 from parallelism with platform 36 will either require,or're'sult in, a sli concavity of the circumferential wheel 27, this bejand axial feeding 26 from parallelism with the plane of platform 36 isnot great, and that the actual concavity of the active surface .of wheel27 would, in many instances, berhardly perceptible to the eye.

I have found in practice that the rotation of the article 43 is largelycontrolled by wheel 22, which I have called the propeller wheel, whilethe grinding operation is accomplished by the more rapidly moving wheel27.

In the form shown in Fig. 6, shaft 51 carries the propeller wheel 52 andis supported in bearings which are carried by cross head 53 adjustable,by a screw 54, laterally at right angles to the axis of the shaft. Shaft55 is substantially parallel with shaft 51,

,or at some defined horizontal angle relative thereto,

and carries a grinding wheel 56. The two wheels 52 and 56 are set so asto have their circumferential edges in cooperative relationship. T heshaft 55 is carried in bearings supported by ahead 57 which isvertically and angularly adjustable in a manner similar to head 25 andbearings 30, 32. In this figure the circumferential surface of wheel 56is shown as concaved, to an exaggerated extent, as a resultof'adjustment of the axis of shaft 55'vertically out of parallelism withshaft 51.

It Wlll be readily understood that, in this form, the circumferentialsurfaces of either or both, wheels 52 and 56 may be coniea frustums. Awork-supporting platform 36 is mounted between the most adjacentportions of the two wheels.

In Fig. 7, I have indicated, in a fragmentary manner, a possiblearrangement of two crown-wheels 61 and 62, arranged to overlap at the1rcrown edges, at one point, with a work-supporting platform 63 betweenthem at this point of adjacency. The two wheels will be rotated in thesame direction and at'dilferent speeds, the slower wheel.

serving as a propeller while the faster wheel operates as a grin er.

It should also be understood that the relative axial movement of thearticle 43 may be controlled both as to amount and direction by verticaladjustment of the platform 36 1 relative to the axis of the propellerwheel 22 audits direction of rotation. It is-preferable that thegrinding wheel-move downea is carried below the axis of the propeller,

wardly adjacent the platform 36 and the propeller must therefore moveupwardly adjacent the platform. If the axis of the article 43 be abovethe-horizontal"- axis of the propeller wheel 42, and, of course, notradial, the axial movement of article 43 will be toward the axis of thepropeller and the speed of this movement will be increased as platform36 is raised. If the axis of article 43 is radial, there will be .noaxial movement of the article and if the axis of the article ranged tosupport peller wheel and grinder, and means adjusting recedes mostconvenient for other structural reasons.

I claim as my invention:

1. In a grinding machine, the combination of a rotary propeller wheelhaving an active crown face, a grinder wheel having an activecircumferential face arranged to cooperatewith the crown face of thepropeller wheel, a work-supporting member ara cylindrical object betweenthe adjacent active faces of the ropeller wheel and grinder, means forad usting the relation between the propeller wheel and work-support tooffset from a radius the contact line between the propeller and theobject to be ground and to maintain the axis of the article to. beground substantially upon the radius of the grinding wheel passingthrough the grinding line of contact, and means for setting the axis ofthe grinder and the work support out of parallelism.

2. In a grinding machine, the combination of a rotary propeller wheelhaving an active crown face, a grinder wheel having an activecircumferential face arranged to cooperate with the crown face of thepropeller wheel, a work-supporting member arranged to support acylindrical object between the adjacent active faces of the poor therelation between the propeller wheel and work-support to offset from aradius the contact line between the propeller and the object to beground and to maintain the axis of the article to be groundsubstantially upon the radius of the grinding wheel passing through thegrinding line of contact.

3. In a grinding machine, the combination of a rotary propeller wheelhaving an active crown face, a grinder wheel having an activecircumferential face arranged to cooperate with the crown face of thepro peller wheel, a work-supporting member arranged to support acylindrical object between the adjacent active faces of the propellerwheel and grinder, and means for setting the axis of the grinder and thework support out of parallelism.

4. In a grinding machine. the combination of a rotary propeller wheelhavingan' active crown face, a grinder wheel having an activecircumferential face arranged to cooperate with the crown face of thepropeller wheel, a work-supporting member arranged to support acylindrical ob'ept bework support and esa-nae tween the adjacent activefaces of the propeller wheel and grinder, means for vertically adjustingthe axis of the grinding Wheel, means for vertically adjusting the meansfor adjusting the vertical angle of the axis of the grinder relative tothe plane of the work support.

In a grinding machine, the combination of a rotary propeller wheelhaving an active crown face, a grinder wheel" having an activecircumferential face arranged to cooperate with the crown face of thepropeller wheel, a work-supporting member arranged to su port tween theadjacent peller wheel and tically adjusting a cylindrical objectbeactive faces of the pro grinder, means for verthe axis of the grindingwheel, and means for vertically adjusting the work support.

In a grinding machine, the combination of a rotatable propeller elementand a rotatable grinding wheelhaving an active circumferential facearranged adjacent the ground, means for propeller element to forma-throat for the reception of a cylindrical object to be supporting suchcylindrical object in said throat, and means for adjusting the angle ofthe axis of the grind ing wheel relative to the plane of the worksupport. 7."In a grinding machine, the combination of a rotatablepropeller element and a rotatable grinding wheel arranged adjacent thepropeller element to form a throat for the reception of a cylindricalobject to be ground, means for supporting such cylindrical object insaid throat, and means for adjusting the angle of the axis of thegrinding wheel relative to the plane of the work support.

8. In a grinding machine, the combination of a rotary propeller wheelhaving an active crown face, a grinder wheel having an activecircumferential face arrangedto cooperate with the crown face of thepropeller wheel, a work-supporting member arranged to support acylindrical object between the adjacentfaces of the propeller wheel andgrinder to produce'a non-radial contact between the crown face of thepropeller and the cylindrical object.

In a grinding machine, the combination of a rotatable propeller wheelhaving an active crown face, ing wheel having an active circumferentialface arranged adjacent the propeller-wheel to form a throat for thereception ofa cylindrical object to be ground, means for su porting suchcylindrical object in sand.

throat, and means for adjusting the relation between the work-supportand propeller to vary the lateral offset of the axis of the article tobe ground relative to the active radius of the propeller wheel.

10. In a grinding machine, the combination of a rotatablepropellerelement and a rotatable grinding wheel having an activecircumferential face arranged adjacent the propeller element to form athroat for the reception of a cylindrical object to be ground, means forsupporting such cylindrical object in said throat, and means for Iadjustingthe relation between the work su a port and propeller to varythe lateral 0 set ofthe axis of the article to be ground relative to theradius of the. propelller element. v

In witness whereof, I have hereunto set my hand at Indianapolis,Indiana, t twenty-sixth day of April, A. D. one thousand nine hnndredand seventeen.

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